7072 aluminum coil is an aluminum–zinc–magnesium alloy in the 7000 series, known for its excellent corrosion resistance, moderate strength, and good formability. It is mainly used for anodized aluminum surfaces and decorative applications, as it can achieve a smooth, uniform surface suitable for coating and finishing.
Description
Yutwin New Materials specializes in the production of aluminum coils and sheets in a wide range of alloys, grades, and specifications, offering stable quality, flexible customization, and reliable supply to meet the diverse needs of different industries.
Features
- Excellent corrosion resistance
Performs exceptionally well in atmospheric, humid, and food-contact environments, ideal for packaging and household applications.
- Good formability and workability
Can be easily rolled, bent, stamped, and deep-drawn, suitable for thin gauge applications such as foil production.
- Lightweight material
Low density ensures ease of handling while maintaining durability for packaging or industrial use.
- High thermal and electrical conductivity
Suitable for applications requiring heat transfer or electrical conduction.
- Smooth surface finish
Ideal for coating, printing, or laminating for decorative or functional purposes.
- Excellent weldability
Compatible with spot and seam welding in specific industrial applications.
Specifications
| Item | Specification |
|---|---|
| Alloy / Grade | 7072 |
| Chemical Composition (%) | Al ≥ 98.8, Zn ≤ 0.05, Mg ≤ 0.2, Mn ≤ 0.15, Si ≤ 0.4, Fe ≤ 0.4, Ti ≤ 0.15, Others ≤ 0.05 |
| Series | 7000 Series (Al-Zn-Mg Alloy) |
| Temper | O, H14, H16 |
| Thickness (mm) | 0.2 – 6 |
| Width (mm) | 100 – 1500 |
| Length (mm) | 1000 – 6000 (Customizable) |
| Surface Finish | Mill Finish, Anodized, Polished |
| Standard | ASTM B209, GB/T 3880, EN AW-7072 |
Common Aluminum Surface Treatments
Polishing
Polishing uses mechanical grinding, chemical, or electrochemical methods to improve the smoothness and brightness of aluminum surfaces. Polished aluminum features a high-gloss finish and excellent decorative appearance.
Brushing
Brushing is a surface treatment process that creates fine, directional textures on aluminum using abrasive belts or brushes. The brushed surface provides a refined metallic appearance while helping conceal minor scratches.
Coating
Coating applies a protective coating onto the aluminum surface through powder coating, liquid spraying, or other coating methods. It provides excellent weather resistance, corrosion protection, and a wide range of color options. Coated aluminum offers both decorative appeal and long-term durabilit.
Anodizing
Anodizing is an electrochemical process that forms a dense oxide layer on the aluminum surface, improving corrosion resistance, wear resistance, and surface hardness. The oxide layer can also be colored to achieve various finishes.
Sand Blasting
Sand blasting uses high-speed abrasive particles to impact the aluminum surface, creating a uniform matte texture. This process provides a soft metallic appearance, reduces fingerprint marks, and improves coating adhesion for subsequent finishing processes.
Embossing
Embossing is a process that forms raised or recessed patterns on aluminum surfaces through rolling or stamping. Common patterns include stucco, diamond, and wood grain textures. Embossed aluminum offers excellent decorative effects, scratch resistance, and certain anti-slip properties.
Applications
- Packaging applications
Widely used in aluminum foil for food, pharmaceutical, and cosmetic packaging due to excellent corrosion resistance and hygienic properties.
- Household applications
Suitable for kitchen foil, baking sheets, and disposable containers.
- Industrial packaging
Applied in chemical and industrial packaging where corrosion resistance, barrier properties, and durability are important.
- Electrical applications
Used for capacitors, shielding, and other thin-gauge electrical components due to good conductivity and corrosion resistance.
- Heat transfer applications
Ideal for components requiring good thermal conductivity, such as heat exchangers or thermal packaging.
- Decorative and functional laminates
Suitable for coating, printing, or laminating for functional or decorative purposes.
